High-temperature tensile rate setting method
A technology of stretching rate and setting method, which is applied in the field of mechanical testing, can solve the problems of cumbersome testing, etc., and achieve the effect of setting scientifically and reasonably, ensuring correctness and reliability, and the method is simple and feasible
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[0020] 1. Process the sample into a high-temperature tensile sample suitable for the tensile test system, such as threaded sample, pin shaft sample, directly clamped round sample or plate sample.
[0021] 2. Using crossbeam displacement control, according to GB / T4338-2006, set the stretching rate of the four stages of linear elastic section, elastic-plastic section, yield section and post-yield section as 0.005 / min, 0.005 / min, 0.005 / min, Stretch at 0.15 / min, and draw a force-extension curve, and find out on the curve from the beginning of the test to the elastic limit R P0.01 time t 1 and the time t until the end of the yielding phase 2 .
[0022] 3. The best test time is 3min or 180s, if t 1 for 315s, t 2 is 450s, then the test time of this test is 450÷180=2.5 times of the optimal time, t 1 :t 2 =315:450=7:10, so the displacement rate of the beam in the linear elastic section of the next sample is set to 0.005×2.5×2÷10×7=0.0175 / min, and the displacement rate of the b...
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